2012 BMW 640 review

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Sound output
Switching on/off When the ignition is switched off: press ON/OFF button on the radio. Muting When the ignition is switched on or the engine is running: press the ON/OFF button on the radio. ...

Intelligent use of advanced light technology
The optional High-Beam Assistant for the new BMW 3-Series Sedan provides enhanced safety at night. The system automatically switches high beam on and off, as conditions require, ensuring that the ...

Switching the microphone to mute
When a call is active, the microphone can be muted. 1. "Telephone". 2. "Active calls". 3. "Microphone mute" A microphone that has been switched to mute is automa ...